Make Encryptor a component. Used by //chrome and (soon) //components/webdata.

chrome/browser/password_manager/login_database_win.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/string_util.h"
-#include "chrome/browser/password_manager/encryptor.h"
 #include "chrome/browser/password_manager/login_database.h"
+#include "components/webdata/encryptor/encryptor.h"
 
 std::string LoginDatabase::EncryptedString(const string16& plain_text)
     const {
   std::string cipher_text;
   if (!Encryptor::EncryptString16(plain_text, &cipher_text))
     NOTREACHED() << "Failed to encrypt string";
   return cipher_text;
 }
 
 string16 LoginDatabase::DecryptedString(const std::string& cipher_text)
     const {
   string16 plain_text;
   if (!Encryptor::DecryptString16(cipher_text, &plain_text))
     NOTREACHED() << "Failed to decrypt string";
   return plain_text;
 }